Field tested to meet the strictest quality standards the 2nd generation Ridgeline series of scopes are built to measure up to the toughest performance standards. The Ridgeline series is newly designed with the latest optical technology such A external locking windage and elevation adjustments. Also feature a P4 sniper glass etched reticle, fully multi-coated optics and true one-piece tube construction. BARSKA's "Accu-Lock" system which utilizes a coil spring positioned within the scope to securely lock the inner tube. This system allows the scope to stay locked dead-on to the target shot after shot. Serious hunters can truly count on the Ridgeline scopes to provide the brightest and sharpest image from edge-to-edge. The riflescopes 1"inch main tube features a shockproof high impact rated design to withstand repeated abuse of high caliber recoil, in the most rugged shooting conditions. Ridgeline scopes include lens covers, flip-up scope caps and are backed by BARSKA's Limited Lifetime Warranty.